Tire-patch.



H. C. ATWOOD.

TIRE PATCH.

APPLICATION FILED NOV-6.1916.

1 2 6, 5 3 6 O Patented June 4, 1918.

A l 77%: J .55- us l/Y I/E/Y 777/2 Cg (CS? WW C. ATWWD, 01F MEAPOLIS, MSU'K A, ASSIGNOR T DKEE-ATWOQD ('30.,

' N'EULIS, MINNESOTA, A CORFOEATION.

specification of Letters Patent.

Patented June 4:, 19th.,

Application filed November 6, 1916. Serial No. 129,725.

To all whom it may concern:

Be it known that I, Y C. A'rwoon, a citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Tire-Patches, of which the followin is a specification.

My intention relates to a patch for repairing the inner tube of a pneumatic tire. to The object of the invention is to provide a patch of such construction that there rm be no possibility of air escapi m the tire through the patch. W

A further object is to provide a tire patch to which can be easily and quickl applied to any part of the tire and w ti ectually l it a ainst the escape of air,

he invention consists ney in a t patch as hereinafter descri and particularly pointed out in the ole.

in the accompanyi drawings or part of this specification,

Figure 1 is a perspective view of a tire patch, the layers of which the patch is made 25 up being separated to illustrate the ative arrangement thereof,

Fig. 2 is a sectional view through a tion of the patch.

In the drawing, 2 represents a sheet of woven fabric, preferably a suitable grade of canvas, which forms the outer surface of the patch and protects the same. N to this fabric is a layer 3 of soft or w ized rubber. A similar layer 3 is provided, to also of unvulead rubber, d betw them I place a layer 4 of canized taw- The function of this latter layer or sheet is to support the layers of raw ruinothem in place and prevent the are; air through the patch when it is 11 over the place in the tire to be rep 13 and when stretche on;

Si b to allow the air to the tire, w by inter the 4 sheet between them I am itto hively prevent such escape, the te-Wt fleet forg an imiorate back ng for the rubher layers and holding th y in plaw in the patch. The outer face of the raw rubber sheet 3,is provi ed with a sheet of mm; -i', fig smbu t ed ed when the p is to n Harem.

as W this pa the e. hlowt or e d hold :lhe sheets of raw rubber are soft and old a i; it Q smallest puncture can be easily and quickly repaired.

The patch may be made in any suitable size and the thickness of the sheets of vul' canized and unvulcanized rubber may be to varied, according to the character of the tire on which the patch is to be used, and in various ways the patch may be modified and still be within the scope oi my invention.-

By placing the sheet of vulcanized rubber between the sheets of crude rubber i of next to the fabric, 1 provide for the outward spreading of the crude rubber and prevent the edges of the patch from cutting the tube. I have also found that the heat w produc by friction in drivim g the car tends I to melt the unvulmnized eso it spread out over the vulcanized sheet and cause the sheets 3 and 3 to adhere to one another at the edges of the canized sh 7t and form a solid protecting sheet between the fabric and the tube.

I claim as my invention: 1. A repair patch for e on I w ace of a tire tube compri a sheet of fabric forming the outer surface of the patch for contact with the shoe, a shat or raw or unvulcanized rubber adjacent to said fabric, a second sheet of unvuld "i= and a sheet of vulcaniz rubber inte between said unvul sheets and we a; a back; and su It for a preventing the are of air emthrough, one of said unvulwnized sh it: a fabric cove erefor which is oved when -the patch is n for con canized sheet with the of such an w or . Edd

yoversuriaoesoith r er a r of said sheet to to a solid p ing sheet e fabric and e 3, A repair pa for a or or surface compri a sh of fabric in w of e p e,

contacting with said rubber inner surface and sealing it against the passage of am, a covering of raw rubber contacting with the inner face of said vulcanized sheet and clos-' ing the joint between the edges of said vulcanized sheet and the surface to be repaired, and a removable fabric adhering to the outer surface of said raw rubber cove 4. A repair patch for. the outer; ace of a tire tube comprising a sheet of fabric forming the outer surface of the patch for i 1 contact with the shoe, a sheet of vulcanized rubber, means arran ed between and securing the sheet of fabric and the sheet of vul- 'canized rubber together, a sheet of raw or becoming vulcanized on the tube through the heat produced by the tire shoe on the outer surface of the patch.

In witness whereof, I have hereunto set my hand this 31' day of October 1916.

v HARRY C. ATWOOD.

Witnesses:

W. L. Po'rmn, E. C. France. 

